Montana Title 61. Motor Vehicles § 61-8-1025. Department rules regarding ignition interlock devices--ignition interlock device provider requirements

(a) be designed so it does not impede safe operation of the vehicle;

(b) correlate well with the level established for alcohol impairment;

(c) work accurately and reliably in an unsupervised environment and under extreme weather conditions;

(d) require a deep lung breath sample or use an equally accurate measure of blood alcohol concentration equivalence;

(e) resist tampering and show evidence of tampering if it is attempted;

(f) be difficult to circumvent;

(g) minimize inconvenience of a sober user;

(h) operate reliably over the range of automobile environments and in connection with various manufacturing standards; and

(i) be manufactured by a person who is adequately insured for product liability.